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Minamisawa, S. et al.

Minamisawa, Uemura, Sato, Yokoyama, Yamaguchi, Inoue, Nakagome, Bai, Hori, Shimizu, Mochizuki, Ishikawa,

Post-transcriptional downregulation of sarcolipin mRNA by triiodothyronine in the atrial myocardium.

Thyroid hormone-mediated positive cardiotropic effects are differently regulated between the atria and ventricles. This regulation is, at least in part, dependent on sarcoplasmic reticulum (SR) proteins. Sarcolipin, a homologue of phospholamban, has been recently identified as an atrium-specific SR protein. The expression of sarcolipin mRNA was significantly decreased in the atria of mice with hyperthyroidism and in 3,5,3'-triiodo-l-thyronine-treated neonatal rat atrial myocytes. Promoter activity and mRNA stability analyses revealed that thyroid hormone post-transcriptionally down regulated the expression of sarcolipin mRNA. The atrium-specific effect of thyroid hormone may occur in part through the regulation of atrial sarcolipin gene expression.[1]

References

Post-transcriptional downregulation of sarcolipin mRNA by triiodothyronine in the atrial myocardium. Minamisawa, S., Uemura, N., Sato, Y., Yokoyama, U., Yamaguchi, T., Inoue, K., Nakagome, M., Bai, Y., Hori, H., Shimizu, M., Mochizuki, S., Ishikawa, Y. FEBS Lett. (2006) [Pubmed]

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